Update changelog for v2.3.4
Update changelog for v2.3.4

Change-Id: I9ae6da08e9aaf6a027d3712c8e425aa8307f8607

tvoli/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,TheModMaker/shaka-player,tvoli/shaka-player,TheModMaker/shaka-player